diff --git a/internal/module/controller.go b/internal/module/controller.go
index 3429434f..774d3833 100644
--- a/internal/module/controller.go
+++ b/internal/module/controller.go
@@ -116,12 +116,12 @@ func splitYAMLDocuments(content string) []string {
 	for _, line := range lines {
 		trimmed := strings.TrimSpace(line)
 
-		// Check if we're starting a multi-line value (|-, |, >-, >)
+		// Check if we're starting a multi-line value.
 		if !inMultiLine && strings.Contains(line, ":") {
 			parts := strings.SplitN(line, ":", 2)
 			if len(parts) == 2 {
 				value := strings.TrimSpace(parts[1])
-				if value == "|-" || value == "|" || value == ">-" || value == ">" {
+				if strings.HasPrefix(value, "|") || strings.HasPrefix(value, ">") {
 					inMultiLine = true
 					indentLevel = len(line) - len(strings.TrimLeft(line, " \t"))
 				}
diff --git a/internal/module/controller_test.go b/internal/module/controller_test.go
new file mode 100644
index 00000000..97fd4520
--- /dev/null
+++ b/internal/module/controller_test.go
@@ -0,0 +1,86 @@
+/*
+Copyright 2026 Flant JSC
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package module
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"sigs.k8s.io/yaml"
+)
+
+const configMapWithYAMLStream = `apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: xxx
+data:
+  apply-on-startup.yaml: |2
+    kind: token
+    version: v2
+    metadata:
+      name: teleport-proxy
+    ---
+    kind: token
+    version: v2
+    metadata:
+      name: teleport-appservice`
+
+const serviceManifest = `apiVersion: v1
+kind: Service
+metadata:
+  name: xxx`
+
+func TestSplitYAMLDocumentsWithBlockScalarIndentIndicator(t *testing.T) {
+	tests := []struct {
+		name     string
+		content  string
+		wantDocs []string
+	}{
+		{
+			name:     "keeps separator inside block scalar",
+			content:  configMapWithYAMLStream,
+			wantDocs: []string{configMapWithYAMLStream},
+		},
+		{
+			name:     "splits after block scalar",
+			content:  joinYAMLDocuments(configMapWithYAMLStream, serviceManifest),
+			wantDocs: []string{configMapWithYAMLStream, serviceManifest},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			docs := splitYAMLDocuments(tt.content)
+			require.Equal(t, tt.wantDocs, docs)
+			requireValidYAMLDocuments(t, docs)
+		})
+	}
+}
+
+func joinYAMLDocuments(docs ...string) string {
+	return strings.Join(docs, "\n---\n")
+}
+
+func requireValidYAMLDocuments(t *testing.T, docs []string) {
+	t.Helper()
+
+	for _, doc := range docs {
+		var node map[string]any
+		require.NoError(t, yaml.UnmarshalStrict([]byte(doc), &node))
+	}
+}